Today there are more than 20 million refugees - 10 times more than when the Geneva Convention was adopted 50 years ago.

But thousands of them are not recognised as refugees by the strict wording of the convention, and many are not given asylum.

Some people say we should rework the convention, acknowledging the different reasons people flee - for example, war, famine, or persecution by non-state agents such as Afghanistan's Taliban or RUF rebels in Sierra Leone.